<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
   <!-- <script src="js/index.js"></script>
    <script>
        alert("HelloWorld")
    </script>-->


    <script language="JavaScript" type="text/javascript"></script>
</head>
<body>
    <h2>welcome to my js hello wolrd page!!</h2>


    <input type="text" onclick="alert('input infomation!')">
    <script src="js/index.js"></script>
  <!--  <script>
        alert("HelloWorld")
    </script>-->
</body>
</html>